text: /*
   * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
   *
   * Licensed under the OpenSSL license (the "License").  You may not use
   * this file except in compliance with the License.  You can obtain a copy
   * in the file LICENSE in the source distribution or at
   * https://www.openssl.org/source/license.html
   */
  
  #ifndef HEADER_ENVELOPE_H
  # define HEADER_ENVELOPE_H
  
  # include <openssl/opensslconf.h>
  # include <openssl/ossl_typ.h>
  # include <openssl/symhacks.h>
  # include <openssl/bio.h>
  # include <openssl/evperr.h>
  # include <oqs/oqs.h>
  
  # define EVP_MAX_MD_SIZE                 64/* longest known is SHA512 */
  # define EVP_MAX_KEY_LENGTH              64
  # define EVP_MAX_IV_LENGTH               16
  # define EVP_MAX_BLOCK_LENGTH            32
  
  # define PKCS5_SALT_LEN                  8
  /* Default PKCS#5 iteration count */
  # define PKCS5_DEFAULT_ITER              2048
  
  # include <openssl/objects.h>
  
  # define EVP_PK_RSA      0x0001
  # define EVP_PK_DSA      0x0002
  # define EVP_PK_DH       0x0004
  # define EVP_PK_EC       0x0008
  # define EVP_PKT_SIGN    0x0010
  # define EVP_PKT_ENC     0x0020
  # define EVP_PKT_EXCH    0x0040
  # define EVP_PKS_RSA     0x0100
  # define EVP_PKS_DSA     0x0200
  # define EVP_PKS_EC      0x0400
  
  # define EVP_PKEY_NONE   NID_undef
  # define EVP_PKEY_RSA    NID_rsaEncryption
  # define EVP_PKEY_RSA2   NID_rsa
  # define EVP_PKEY_RSA_PSS NID_rsassaPss
  # define EVP_PKEY_DSA    NID_dsa
  # define EVP_PKEY_DSA1   NID_dsa_2
  # define EVP_PKEY_DSA2   NID_dsaWithSHA
  # define EVP_PKEY_DSA3   NID_dsaWithSHA1
  # define EVP_PKEY_DSA4   NID_dsaWithSHA1_2
  # define EVP_PKEY_DH     NID_dhKeyAgreement
  # define EVP_PKEY_DHX    NID_dhpublicnumber
  # define EVP_PKEY_EC     NID_X9_62_id_ecPublicKey
  # define EVP_PKEY_SM2    NID_sm2
  # define EVP_PKEY_HMAC   NID_hmac
  # define EVP_PKEY_CMAC   NID_cmac
  # define EVP_PKEY_SCRYPT NID_id_scrypt
  # define EVP_PKEY_TLS1_PRF NID_tls1_prf
  # define EVP_PKEY_HKDF   NID_hkdf
  # define EVP_PKEY_POLY1305 NID_poly1305
  # define EVP_PKEY_SIPHASH NID_siphash
  # define EVP_PKEY_X25519 NID_X25519
  # define EVP_PKEY_ED25519 NID_ED25519
  # define EVP_PKEY_X448 NID_X448
  # define EVP_PKEY_ED448 NID_ED448
  ///// OQS_TEMPLATE_FRAGMENT_DEFINE_EVP_PKEYS_START
  # define EVP_PKEY_DILITHIUM2 NID_dilithium2
  # define EVP_PKEY_P256_DILITHIUM2 NID_p256_dilithium2
  # define EVP_PKEY_RSA3072_DILITHIUM2 NID_rsa3072_dilithium2
  # define EVP_PKEY_DILITHIUM3 NID_dilithium3
  # define EVP_PKEY_P384_DILITHIUM3 NID_p384_dilithium3
  # define EVP_PKEY_DILITHIUM5 NID_dilithium5
  # define EVP_PKEY_P521_DILITHIUM5 NID_p521_dilithium5
  # define EVP_PKEY_DILITHIUM2_AES NID_dilithium2_aes
  # define EVP_PKEY_P256_DILITHIUM2_AES NID_p256_dilithium2_aes
  # define EVP_PKEY_RSA3072_DILITHIUM2_AES NID_rsa3072_dilithium2_aes
  # define EVP_PKEY_DILITHIUM3_AES NID_dilithium3_aes
  # define EVP_PKEY_P384_DILITHIUM3_AES NID_p384_dilithium3_aes
  # define EVP_PKEY_DILITHIUM5_AES NID_dilithium5_aes
  # define EVP_PKEY_P521_DILITHIUM5_AES NID_p521_dilithium5_aes
  # define EVP_PKEY_FALCON512 NID_falcon512
  # define EVP_PKEY_P256_FALCON512 NID_p256_falcon512
  # define EVP_PKEY_RSA3072_FALCON512 NID_rsa3072_falcon512
  # define EVP_PKEY_FALCON1024 NID_falcon1024
  # define EVP_PKEY_P521_FALCON1024 NID_p521_falcon1024
  # define EVP_PKEY_PICNICL1FULL NID_picnicl1full
  # define EVP_PKEY_P256_PICNICL1FULL NID_p256_picnicl1full
  # define EVP_PKEY_RSA3072_PICNICL1FULL NID_rsa3072_picnicl1full
  # define EVP_PKEY_PICNIC3L1 NID_picnic3l1
  # define EVP_PKEY_P256_PICNIC3L1 NID_p256_picnic3l1
  # define EVP_PKEY_RSA3072_PICNIC3L1 NID_rsa3072_picnic3l1
  # define EVP_PKEY_RAINBOWICLASSIC NID_rainbowIclassic
  # define EVP_PKEY_P256_RAINBOWICLASSIC NID_p256_rainbowIclassic
  # define EVP_PKEY_RSA3072_RAINBOWICLASSIC NID_rsa3072_rainbowIclassic
  # define EVP_PKEY_RAINBOWVCLASSIC NID_rainbowVclassic
  # define EVP_PKEY_P521_RAINBOWVCLASSIC NID_p521_rainbowVclassic
  # define EVP_PKEY_SPHINCSHARAKA128FROBUST NID_sphincsharaka128frobust
  # define EVP_PKEY_P256_SPHINCSHARAKA128FROBUST NID_p256_sphincsharaka128frobust
  # define EVP_PKEY_RSA3072_SPHINCSHARAKA128FROBUST NID_rsa3072_sphincsharaka128frobust
  # define EVP_PKEY_SPHINCSSHA256128FROBUST NID_sphincssha256128frobust
  # define EVP_PKEY_P256_SPHINCSSHA256128FROBUST NID_p256_sphincssha256128frobust
  # define EVP_PKEY_RSA3072_SPHINCSSHA256128FROBUST NID_rsa3072_sphincssha256128frobust
  # define EVP_PKEY_SPHINCSSHAKE256128FROBUST NID_sphincsshake256128frobust
  # define EVP_PKEY_P256_SPHINCSSHAKE256128FROBUST NID_p256_sphincsshake256128frobust
  # define EVP_PKEY_RSA3072_SPHINCSSHAKE256128FROBUST NID_rsa3072_sphincsshake256128frobust
  #define OQS_OPENSSL_SIG_algs_length 39
  #define OQS_OPENSSL_KEM_algs_length 42
  #define IS_OQS_OPENSSL_KEM_NID(a) ((a >= 0x01FF) && (a <= NID_p521_sntrup1277))
  #define IS_OQS_OPENSSL_SIG_NID(a) ((a >= NID_dilithium2) && (a <= NID_rsa3072_sphincsshake256128frobust))
  /////// OQS_TEMPLATE_FRAGMENT_DEFINE_EVP_PKEYS_END
  const char *OQSKEM_options(void);
  const char *OQSSIG_options(void);
  int oqs_size(const EVP_PKEY *pkey);
  int* get_oqssl_sig_nids(void);
  int* get_oqssl_kem_nids(void);
  char* get_oqs_alg_name(int openssl_nid);
  
  
  #ifdef  __cplusplus
  extern "C" {
  #endif
  
  # define EVP_PKEY_MO_SIGN        0x0001
  # define EVP_PKEY_MO_VERIFY      0x0002
  # define EVP_PKEY_MO_ENCRYPT     0x0004
  # define EVP_PKEY_MO_DECRYPT     0x0008
  
  # ifndef EVP_MD
  EVP_MD *EVP_MD_meth_new(int md_type, int pkey_type);
  EVP_MD *EVP_MD_meth_dup(const EVP_MD *md);
  void EVP_MD_meth_free(EVP_MD *md);
  
  int EVP_MD_meth_set_input_blocksize(EVP_MD *md, int blocksize);
  int EVP_MD_meth_set_result_size(EVP_MD *md, int resultsize);
  int EVP_MD_meth_set_app_datasize(EVP_MD *md, int datasize);
  int EVP_MD_meth_set_flags(EVP_MD *md, unsigned long flags);
  int EVP_MD_meth_set_init(EVP_MD *md, int (*init)(EVP_MD_CTX *ctx));
  int EVP_MD_meth_set_update(EVP_MD *md, int (*update)(EVP_MD_CTX *ctx,
                                                       const void *data,
                                                       size_t count));
  int EVP_MD_meth_set_final(EVP_MD *md, int (*final)(EVP_MD_CTX *ctx,
                                                     unsigned char *md));
  int EVP_MD_meth_set_copy(EVP_MD *md, int (*copy)(EVP_MD_CTX *to,
                                                   const EVP_MD_CTX *from));
  int EVP_MD_meth_set_cleanup(EVP_MD *md, int (*cleanup)(EVP_MD_CTX *ctx));
  int EVP_MD_meth_set_ctrl(EVP_MD *md, int (*ctrl)(EVP_MD_CTX *ctx, int cmd,
                                                   int p1, void *p2));
  
  int EVP_MD_meth_get_input_blocksize(const EVP_MD *md);
  int EVP_MD_meth_get_result_size(const EVP_MD *md);
  int EVP_MD_meth_get_app_datasize(const EVP_MD *md);
  unsigned long EVP_MD_meth_get_flags(const EVP_MD *md);
  int (*EVP_MD_meth_get_init(const EVP_MD *md))(EVP_MD_CTX *ctx);
  int (*EVP_MD_meth_get_update(const EVP_MD *md))(EVP_MD_CTX *ctx,
                                                  const void *data,
                                                  size_t count);
  int (*EVP_MD_meth_get_final(const EVP_MD *md))(EVP_MD_CTX *ctx,
                                                 unsigned char *md);
  int (*EVP_MD_meth_get_copy(const EVP_MD *md))(EVP_MD_CTX *to,
                                                const EVP_MD_CTX *from);
  int (*EVP_MD_meth_get_cleanup(const EVP_MD *md))(EVP_MD_CTX *ctx);
  int (*EVP_MD_meth_get_ctrl(const EVP_MD *md))(EVP_MD_CTX *ctx, int cmd,
                                                int p1, void *p2);
  
  /* digest can only handle a single block */
  #  define EVP_MD_FLAG_ONESHOT     0x0001
  
  /* digest is extensible-output function, XOF */
  #  define EVP_MD_FLAG_XOF         0x0002
  
  /* DigestAlgorithmIdentifier flags... */
  
  #  define EVP_MD_FLAG_DIGALGID_MASK               0x0018
  
  /* NULL or absent parameter accepted. Use NULL */
  
  #  define EVP_MD_FLAG_DIGALGID_NULL               0x0000
  
  /* NULL or absent parameter accepted. Use NULL for PKCS#1 otherwise absent */
  
  #  define EVP_MD_FLAG_DIGALGID_ABSENT             0x0008
  
  /* Custom handling via ctrl */
  
  #  define EVP_MD_FLAG_DIGALGID_CUSTOM             0x0018
  
  /* Note if suitable for use in FIPS mode */
  #  define EVP_MD_FLAG_FIPS        0x0400
  
  /* Digest ctrls */
  
  #  define EVP_MD_CTRL_DIGALGID                    0x1
  #  define EVP_MD_CTRL_MICALG                      0x2
  #  define EVP_MD_CTRL_XOF_LEN                     0x3
  
  /* Minimum Algorithm specific ctrl value */
  
  #  define EVP_MD_CTRL_ALG_CTRL                    0x1000
  
  # endif                         /* !EVP_MD */
  
  /* values for EVP_MD_CTX flags */
  
  # define EVP_MD_CTX_FLAG_ONESHOT         0x0001/* digest update will be
                                                  * called once only */
  # define EVP_MD_CTX_FLAG_CLEANED         0x0002/* context has already been
                                                  * cleaned */
  # define EVP_MD_CTX_FLAG_REUSE           0x0004/* Don't free up ctx->md_data
                                                  * in EVP_MD_CTX_reset */
  /*
   * FIPS and pad options are ignored in 1.0.0, definitions are here so we
   * don't accidentally reuse the values for other purposes.
   */
  
  # define EVP_MD_CTX_FLAG_NON_FIPS_ALLOW  0x0008/* Allow use of non FIPS
                                                  * digest in FIPS mode */
  
  /*
   * The following PAD options are also currently ignored in 1.0.0, digest
   * parameters are handled through EVP_DigestSign*() and EVP_DigestVerify*()
   * instead.
   */
  # define EVP_MD_CTX_FLAG_PAD_MASK        0xF0/* RSA mode to use */
  # define EVP_MD_CTX_FLAG_PAD_PKCS1       0x00/* PKCS#1 v1.5 mode */
  # define EVP_MD_CTX_FLAG_PAD_X931        0x10/* X9.31 mode */
  # define EVP_MD_CTX_FLAG_PAD_PSS         0x20/* PSS mode */
  
  # define EVP_MD_CTX_FLAG_NO_INIT         0x0100/* Don't initialize md_data */
  /*
   * Some functions such as EVP_DigestSign only finalise copies of internal
   * contexts so additional data can be included after the finalisation call.
   * This is inefficient if this functionality is not required: it is disabled
   * if the following flag is set.
   */
  # define EVP_MD_CTX_FLAG_FINALISE        0x0200
  /* NOTE: 0x0400 is reserved for internal usage */
  
  EVP_CIPHER *EVP_CIPHER_meth_new(int cipher_type, int block_size, int key_len);
  EVP_CIPHER *EVP_CIPHER_meth_dup(const EVP_CIPHER *cipher);
  void EVP_CIPHER_meth_free(EVP_CIPHER *cipher);
  
  int EVP_CIPHER_meth_set_iv_length(EVP_CIPHER *cipher, int iv_len);
  int EVP_CIPHER_meth_set_flags(EVP_CIPHER *cipher, unsigned long flags);
  int EVP_CIPHER_meth_set_impl_ctx_size(EVP_CIPHER *cipher, int ctx_size);
  int EVP_CIPHER_meth_set_init(EVP_CIPHER *cipher,
                               int (*init) (EVP_CIPHER_CTX *ctx,
                                            const unsigned char *key,
                                            const unsigned char *iv,
                                            int enc));
  int EVP_CIPHER_meth_set_do_cipher(EVP_CIPHER *cipher,
                                    int (*do_cipher) (EVP_CIPHER_CTX *ctx,
                                                      unsigned char *out,
                                                      const unsigned char *in,
                                                      size_t inl));
  int EVP_CIPHER_meth_set_cleanup(EVP_CIPHER *cipher,
                                  int (*cleanup) (EVP_CIPHER_CTX *));
  int EVP_CIPHER_meth_set_set_asn1_params(EVP_CIPHER *cipher,
                                          int (*set_asn1_parameters) (EVP_CIPHER_CTX *,
                                                                      ASN1_TYPE *));
  int EVP_CIPHER_meth_set_get_asn1_params(EVP_CIPHER *cipher,
                                          int (*get_asn1_parameters) (EVP_CIPHER_CTX *,
                                                                      ASN1_TYPE *));
  int EVP_CIPHER_meth_set_ctrl(EVP_CIPHER *cipher,
                               int (*ctrl) (EVP_CIPHER_CTX *, int type,
                                            int arg, void *ptr));
  
  int (*EVP_CIPHER_meth_get_init(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *ctx,
                                                            const unsigned char *key,
                                                            const unsigned char *iv,
                                                            int enc);
  int (*EVP_CIPHER_meth_get_do_cipher(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *ctx,
                                                                 unsigned char *out,
                                                                 const unsigned char *in,
                                                                 size_t inl);
  int (*EVP_CIPHER_meth_get_cleanup(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *);
  int (*EVP_CIPHER_meth_get_set_asn1_params(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
                                                                       ASN1_TYPE *);
  int (*EVP_CIPHER_meth_get_get_asn1_params(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
                                                                 ASN1_TYPE *);
  int (*EVP_CIPHER_meth_get_ctrl(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
                                                            int type, int arg,
                                                            void *ptr);
  
  /* Values for cipher flags */
  
  /* Modes for ciphers */
  
  # define         EVP_CIPH_STREAM_CIPHER          0x0
  # define         EVP_CIPH_ECB_MODE               0x1
  # define         EVP_CIPH_CBC_MODE               0x2
  # define         EVP_CIPH_CFB_MODE               0x3
  # define         EVP_CIPH_OFB_MODE               0x4
  # define         EVP_CIPH_CTR_MODE               0x5
  # define         EVP_CIPH_GCM_MODE               0x6
  # define         EVP_CIPH_CCM_MODE               0x7
  # define         EVP_CIPH_XTS_MODE               0x10001
  # define         EVP_CIPH_WRAP_MODE              0x10002
  # define         EVP_CIPH_OCB_MODE               0x10003
  # define         EVP_CIPH_MODE                   0xF0007
  /* Set if variable length cipher */
  # define         EVP_CIPH_VARIABLE_LENGTH        0x8
  /* Set if the iv handling should be done by the cipher itself */
  # define         EVP_CIPH_CUSTOM_IV              0x10
  /* Set if the cipher's init() function should be called if key is NULL */
  # define         EVP_CIPH_ALWAYS_CALL_INIT       0x20
  /* Call ctrl() to init cipher parameters */
  # define         EVP_CIPH_CTRL_INIT              0x40
  /* Don't use standard key length function */
  # define         EVP_CIPH_CUSTOM_KEY_LENGTH      0x80
  /* Don't use standard block padding */
  # define         EVP_CIPH_NO_PADDING             0x100
  /* cipher handles random key generation */
  # define         EVP_CIPH_RAND_KEY               0x200
  /* cipher has its own additional copying logic */
  # define         EVP_CIPH_CUSTOM_COPY            0x400
  /* Don't use standard iv length function */
  # define         EVP_CIPH_CUSTOM_IV_LENGTH       0x800
  /* Allow use default ASN1 get/set iv */
  # define         EVP_CIPH_FLAG_DEFAULT_ASN1      0x1000
  /* Buffer length in bits not bytes: CFB1 mode only */
  # define         EVP_CIPH_FLAG_LENGTH_BITS       0x2000
  /* Note if suitable for use in FIPS mode */
  # define         EVP_CIPH_FLAG_FIPS              0x4000
  /* Allow non FIPS cipher in FIPS mode */
  # define         EVP_CIPH_FLAG_NON_FIPS_ALLOW    0x8000
  /*
   * Cipher handles any and all padding logic as well as finalisation.
   */
  # define         EVP_CIPH_FLAG_CUSTOM_CIPHER     0x100000
  # define         EVP_CIPH_FLAG_AEAD_CIPHER       0x200000
  # define         EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK 0x400000
  /* Cipher can handle pipeline operations */
  # define         EVP_CIPH_FLAG_PIPELINE          0X800000
  
  /*
   * Cipher context flag to indicate we can handle wrap mode: if allowed in
   * older applications it could overflow buffers.
   */
  
  # define         EVP_CIPHER_CTX_FLAG_WRAP_ALLOW  0x1
  
  /* ctrl() values */
  
  # define         EVP_CTRL_INIT                   0x0
  # define         EVP_CTRL_SET_KEY_LENGTH         0x1
  # define         EVP_CTRL_GET_RC2_KEY_BITS       0x2
  # define         EVP_CTRL_SET_RC2_KEY_BITS       0x3
  # define         EVP_CTRL_GET_RC5_ROUNDS         0x4
  # define         EVP_CTRL_SET_RC5_ROUNDS         0x5
  # define         EVP_CTRL_RAND_KEY               0x6
  # define         EVP_CTRL_PBE_PRF_NID            0x7
  # define         EVP_CTRL_COPY                   0x8
  # define         EVP_CTRL_AEAD_SET_IVLEN         0x9
  # define         EVP_CTRL_AEAD_GET_TAG           0x10
  # define         EVP_CTRL_AEAD_SET_TAG           0x11
  # define         EVP_CTRL_AEAD_SET_IV_FIXED      0x12
  # define         EVP_CTRL_GCM_SET_IVLEN          EVP_CTRL_AEAD_SET_IVLEN
  # define         EVP_CTRL_GCM_GET_TAG            EVP_CTRL_AEAD_GET_TAG
  # define         EVP_CTRL_GCM_SET_TAG            EVP_CTRL_AEAD_SET_TAG
  # define         EVP_CTRL_GCM_SET_IV_FIXED       EVP_CTRL_AEAD_SET_IV_FIXED
  # define         EVP_CTRL_GCM_IV_GEN             0x13
  # define         EVP_CTRL_CCM_SET_IVLEN          EVP_CTRL_AEAD_SET_IVLEN
  # define         EVP_CTRL_CCM_GET_TAG            EVP_CTRL_AEAD_GET_TAG
  # define         EVP_CTRL_CCM_SET_TAG            EVP_CTRL_AEAD_SET_TAG
  # define         EVP_CTRL_CCM_SET_IV_FIXED       EVP_CTRL_AEAD_SET_IV_FIXED
  # define         EVP_CTRL_CCM_SET_L              0x14
  # define         EVP_CTRL_CCM_SET_MSGLEN         0x15
  /*
   * AEAD cipher deduces payload length and returns number of bytes required to
   * store MAC and eventual padding. Subsequent call to EVP_Cipher even
   * appends/verifies MAC.
   */
  # define         EVP_CTRL_AEAD_TLS1_AAD          0x16
  /* Used by composite AEAD ciphers, no-op in GCM, CCM... */
  # define         EVP_CTRL_AEAD_SET_MAC_KEY       0x17
  /* Set the GCM invocation field, decrypt only */
  # define         EVP_CTRL_GCM_SET_IV_INV         0x18
  
  # define         EVP_CTRL_TLS1_1_MULTIBLOCK_AAD  0x19
  # define         EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT      0x1a
  # define         EVP_CTRL_TLS1_1_MULTIBLOCK_DECRYPT      0x1b
  # define         EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE  0x1c
  
  # define         EVP_CTRL_SSL3_MASTER_SECRET             0x1d
  
  /* EVP_CTRL_SET_SBOX takes the char * specifying S-boxes */
  # define         EVP_CTRL_SET_SBOX                       0x1e
  /*
   * EVP_CTRL_SBOX_USED takes a 'size_t' and 'char *', pointing at a
   * pre-allocated buffer with specified size
   */
  # define         EVP_CTRL_SBOX_USED                      0x1f
  /* EVP_CTRL_KEY_MESH takes 'size_t' number of bytes to mesh the key after,
   * 0 switches meshing off
   */
  # define         EVP_CTRL_KEY_MESH                       0x20
  /* EVP_CTRL_BLOCK_PADDING_MODE takes the padding mode */
  # define         EVP_CTRL_BLOCK_PADDING_MODE             0x21
  
  /* Set the output buffers to use for a pipelined operation */
  # define         EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS       0x22
  /* Set the input buffers to use for a pipelined operation */
  # define         EVP_CTRL_SET_PIPELINE_INPUT_BUFS        0x23
  /* Set the input buffer lengths to use for a pipelined operation */
  # define         EVP_CTRL_SET_PIPELINE_INPUT_LENS        0x24
  
  # define         EVP_CTRL_GET_IVLEN                      0x25
  
  /* Padding modes */
  #define EVP_PADDING_PKCS7       1
  #define EVP_PADDING_ISO7816_4   2
  #define EVP_PADDING_ANSI923     3
  #define EVP_PADDING_ISO10126    4
  #define EVP_PADDING_ZERO        5
  
  /* RFC 5246 defines additional data to be 13 bytes in length */
  # define         EVP_AEAD_TLS1_AAD_LEN           13
  
  typedef struct {
      unsigned char *out;
      const unsigned char *inp;
      size_t len;
      unsigned int interleave;
  } EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM;
  
  /* GCM TLS constants */
  /* Length of fixed part of IV derived from PRF */
  # define EVP_GCM_TLS_FIXED_IV_LEN                        4
  /* Length of explicit part of IV part of TLS records */
  # define EVP_GCM_TLS_EXPLICIT_IV_LEN                     8
  /* Length of tag for TLS */
  # define EVP_GCM_TLS_TAG_LEN                             16
  
  /* CCM TLS constants */
  /* Length of fixed part of IV derived from PRF */
  # define EVP_CCM_TLS_FIXED_IV_LEN                        4
  /* Length of explicit part of IV part of TLS records */
  # define EVP_CCM_TLS_EXPLICIT_IV_LEN                     8
  /* Total length of CCM IV length for TLS */
  # define EVP_CCM_TLS_IV_LEN                              12
  /* Length of tag for TLS */
  # define EVP_CCM_TLS_TAG_LEN                             16
  /* Length of CCM8 tag for TLS */
  # define EVP_CCM8_TLS_TAG_LEN                            8
  
  /* Length of tag for TLS */
  # define EVP_CHACHAPOLY_TLS_TAG_LEN                      16
  
  typedef struct evp_cipher_info_st {
      const EVP_CIPHER *cipher;
      unsigned char iv[EVP_MAX_IV_LENGTH];
  } EVP_CIPHER_INFO;
  
  
  /* Password based encryption function */
  typedef int (EVP_PBE_KEYGEN) (EVP_CIPHER_CTX *ctx, const char *pass,
                                int passlen, ASN1_TYPE *param,
                                const EVP_CIPHER *cipher, const EVP_MD *md,
                                int en_de);
  
  # ifndef OPENSSL_NO_RSA
  #  define EVP_PKEY_assign_RSA(pkey,rsa) EVP_PKEY_assign((pkey),EVP_PKEY_RSA,\
                                          (char *)(rsa))
  # endif
  
  # ifndef OPENSSL_NO_DSA
  #  define EVP_PKEY_assign_DSA(pkey,dsa) EVP_PKEY_assign((pkey),EVP_PKEY_DSA,\
                                          (char *)(dsa))
  # endif
  
  # ifndef OPENSSL_NO_DH
  #  define EVP_PKEY_assign_DH(pkey,dh) EVP_PKEY_assign((pkey),EVP_PKEY_DH,\
                                          (char *)(dh))
  # endif
  
  # ifndef OPENSSL_NO_EC
  #  define EVP_PKEY_assign_EC_KEY(pkey,eckey) EVP_PKEY_assign((pkey),EVP_PKEY_EC,\
                                          (char *)(eckey))
  # endif
  # ifndef OPENSSL_NO_SIPHASH
  #  define EVP_PKEY_assign_SIPHASH(pkey,shkey) EVP_PKEY_assign((pkey),EVP_PKEY_SIPHASH,\
                                          (char *)(shkey))
  # endif
  
  # ifndef OPENSSL_NO_POLY1305
  #  define EVP_PKEY_assign_POLY1305(pkey,polykey) EVP_PKEY_assign((pkey),EVP_PKEY_POLY1305,\
                                          (char *)(polykey))
  # endif
  
  /* Add some extra combinations */
  # define EVP_get_digestbynid(a) EVP_get_digestbyname(OBJ_nid2sn(a))
  # define EVP_get_digestbyobj(a) EVP_get_digestbynid(OBJ_obj2nid(a))
  # define EVP_get_cipherbynid(a) EVP_get_cipherbyname(OBJ_nid2sn(a))
  # define EVP_get_cipherbyobj(a) EVP_get_cipherbynid(OBJ_obj2nid(a))
  
  int EVP_MD_type(const EVP_MD *md);
  # define EVP_MD_nid(e)                   EVP_MD_type(e)
  # define EVP_MD_name(e)                  OBJ_nid2sn(EVP_MD_nid(e))
  int EVP_MD_pkey_type(const EVP_MD *md);
  int EVP_MD_size(const EVP_MD *md);
  int EVP_MD_block_size(const EVP_MD *md);
  unsigned long EVP_MD_flags(const EVP_MD *md);
  
  const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx);
  int (*EVP_MD_CTX_update_fn(EVP_MD_CTX *ctx))(EVP_MD_CTX *ctx,
                                               const void *data, size_t count);
  void EVP_MD_CTX_set_update_fn(EVP_MD_CTX *ctx,
                                int (*update) (EVP_MD_CTX *ctx,
                                               const void *data, size_t count));
  # define EVP_MD_CTX_size(e)              EVP_MD_size(EVP_MD_CTX_md(e))
  # define EVP_MD_CTX_block_size(e)        EVP_MD_block_size(EVP_MD_CTX_md(e))
  # define EVP_MD_CTX_type(e)              EVP_MD_type(EVP_MD_CTX_md(e))
  EVP_PKEY_CTX *EVP_MD_CTX_pkey_ctx(const EVP_MD_CTX *ctx);
  void EVP_MD_CTX_set_pkey_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pctx);
  void *EVP_MD_CTX_md_data(const EVP_MD_CTX *ctx);
  
  int EVP_CIPHER_nid(const EVP_CIPHER *cipher);
  # define EVP_CIPHER_name(e)              OBJ_nid2sn(EVP_CIPHER_nid(e))
  int EVP_CIPHER_block_size(const EVP_CIPHER *cipher);
  int EVP_CIPHER_impl_ctx_size(const EVP_CIPHER *cipher);
  int EVP_CIPHER_key_length(const EVP_CIPHER *cipher);
  int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher);
  unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher);
  # define EVP_CIPHER_mode(e)              (EVP_CIPHER_flags(e) & EVP_CIPH_MODE)
  
  const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx);
  int EVP_CIPHER_CTX_encrypting(const EVP_CIPHER_CTX *ctx);
  int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx);
  int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx);
  int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx);
  int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx);
  const unsigned char *EVP_CIPHER_CTX_iv(const EVP_CIPHER_CTX *ctx);
  const unsigned char *EVP_CIPHER_CTX_original_iv(const EVP_CIPHER_CTX *ctx);
  unsigned char *EVP_CIPHER_CTX_iv_noconst(EVP_CIPHER_CTX *ctx);
  unsigned char *EVP_CIPHER_CTX_buf_noconst(EVP_CIPHER_CTX *ctx);
  int EVP_CIPHER_CTX_num(const EVP_CIPHER_CTX *ctx);
  void EVP_CIPHER_CTX_set_num(EVP_CIPHER_CTX *ctx, int num);
  int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in);
  void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx);
  void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data);
  void *EVP_CIPHER_CTX_get_cipher_data(const EVP_CIPHER_CTX *ctx);
  void *EVP_CIPHER_CTX_set_cipher_data(EVP_CIPHER_CTX *ctx, void *cipher_data);
  # define EVP_CIPHER_CTX_type(c)         EVP_CIPHER_type(EVP_CIPHER_CTX_cipher(c))
  # if OPENSSL_API_COMPAT < 0x10100000L
  #  define EVP_CIPHER_CTX_flags(c)       EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(c))
  # endif
  # define EVP_CIPHER_CTX_mode(c)         EVP_CIPHER_mode(EVP_CIPHER_CTX_cipher(c))
  
  # define EVP_ENCODE_LENGTH(l)    ((((l)+2)/3*4)+((l)/48+1)*2+80)
  # define EVP_DECODE_LENGTH(l)    (((l)+3)/4*3+80)
  
  # define EVP_SignInit_ex(a,b,c)          EVP_DigestInit_ex(a,b,c)
  # define EVP_SignInit(a,b)               EVP_DigestInit(a,b)
  # define EVP_SignUpdate(a,b,c)           EVP_DigestUpdate(a,b,c)
  # define EVP_VerifyInit_ex(a,b,c)        EVP_DigestInit_ex(a,b,c)
  # define EVP_VerifyInit(a,b)             EVP_DigestInit(a,b)
  # define EVP_VerifyUpdate(a,b,c)         EVP_DigestUpdate(a,b,c)
  # define EVP_OpenUpdate(a,b,c,d,e)       EVP_DecryptUpdate(a,b,c,d,e)
  # define EVP_SealUpdate(a,b,c,d,e)       EVP_EncryptUpdate(a,b,c,d,e)
  # define EVP_DigestSignUpdate(a,b,c)     EVP_DigestUpdate(a,b,c)
  # define EVP_DigestVerifyUpdate(a,b,c)   EVP_DigestUpdate(a,b,c)
  
  # ifdef CONST_STRICT
  void BIO_set_md(BIO *, const EVP_MD *md);
  # else
  #  define BIO_set_md(b,md)          BIO_ctrl(b,BIO_C_SET_MD,0,(char *)(md))
  # endif
  # define BIO_get_md(b,mdp)          BIO_ctrl(b,BIO_C_GET_MD,0,(char *)(mdp))
  # define BIO_get_md_ctx(b,mdcp)     BIO_ctrl(b,BIO_C_GET_MD_CTX,0, \
                                               (char *)(mdcp))
  # define BIO_set_md_ctx(b,mdcp)     BIO_ctrl(b,BIO_C_SET_MD_CTX,0, \
                                               (char *)(mdcp))
  # define BIO_get_cipher_status(b)   BIO_ctrl(b,BIO_C_GET_CIPHER_STATUS,0,NULL)
  # define BIO_get_cipher_ctx(b,c_pp) BIO_ctrl(b,BIO_C_GET_CIPHER_CTX,0, \
                                               (char *)(c_pp))
  
  /*__owur*/ int EVP_Cipher(EVP_CIPHER_CTX *c,
                            unsigned char *out,
                            const unsigned char *in, unsigned int inl);
  
  # define EVP_add_cipher_alias(n,alias) \
          OBJ_NAME_add((alias),OBJ_NAME_TYPE_CIPHER_METH|OBJ_NAME_ALIAS,(n))
  # define EVP_add_digest_alias(n,alias) \
          OBJ_NAME_add((alias),OBJ_NAME_TYPE_MD_METH|OBJ_NAME_ALIAS,(n))
  # define EVP_delete_cipher_alias(alias) \
          OBJ_NAME_remove(alias,OBJ_NAME_TYPE_CIPHER_METH|OBJ_NAME_ALIAS);
  # define EVP_delete_digest_alias(alias) \
          OBJ_NAME_remove(alias,OBJ_NAME_TYPE_MD_METH|OBJ_NAME_ALIAS);
  
  int EVP_MD_CTX_ctrl(EVP_MD_CTX *ctx, int cmd, int p1, void *p2);
  EVP_MD_CTX *EVP_MD_CTX_new(void);
  int EVP_MD_CTX_reset(EVP_MD_CTX *ctx);
  void EVP_MD_CTX_free(EVP_MD_CTX *ctx);
  # define EVP_MD_CTX_create()     EVP_MD_CTX_new()
  # define EVP_MD_CTX_init(ctx)    EVP_MD_CTX_reset((ctx))
  # define EVP_MD_CTX_destroy(ctx) EVP_MD_CTX_free((ctx))
  __owur int EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in);
  void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags);
  void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags);
  int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags);
  __owur int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type,
                                   ENGINE *impl);
  __owur int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *d,
                                  size_t cnt);
  __owur int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md,
                                    unsigned int *s);
  __owur int EVP_Digest(const void *data, size_t count,
                            unsigned char *md, unsigned int *size,
                            const EVP_MD *type, ENGINE *impl);
  
  __owur int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in);
  __owur int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type);
  __owur int EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md,
                             unsigned int *s);
  __owur int EVP_DigestFinalXOF(EVP_MD_CTX *ctx, unsigned char *md,
                                size_t len);
  
  int EVP_read_pw_string(char *buf, int length, const char *prompt, int verify);
  int EVP_read_pw_string_min(char *buf, int minlen, int maxlen,
                             const char *prompt, int verify);
  void EVP_set_pw_prompt(const char *prompt);
  char *EVP_get_pw_prompt(void);
  
  __owur int EVP_BytesToKey(const EVP_CIPHER *type, const EVP_MD *md,
                            const unsigned char *salt,
                            const unsigned char *data, int datal, int count,
                            unsigned char *key, unsigned char *iv);
  
  void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags);
  void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags);
  int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags);
  
  __owur int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
                             const unsigned char *key, const unsigned char *iv);
  /*__owur*/ int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx,
                                    const EVP_CIPHER *cipher, ENGINE *impl,
                                    const unsigned char *key,
                                    const unsigned char *iv);
  /*__owur*/ int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out,
                                   int *outl, const unsigned char *in, int inl);
  /*__owur*/ int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out,
                                     int *outl);
  /*__owur*/ int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out,
                                  int *outl);
  
  __owur int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
                             const unsigned char *key, const unsigned char *iv);
  /*__owur*/ int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx,
                                    const EVP_CIPHER *cipher, ENGINE *impl,
                                    const unsigned char *key,
                                    const unsigned char *iv);
  /*__owur*/ int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out,
                                   int *outl, const unsigned char *in, int inl);
  __owur int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *outm,
                              int *outl);
  /*__owur*/ int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *outm,
                                     int *outl);
  
  __owur int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
                            const unsigned char *key, const unsigned char *iv,
                            int enc);
  /*__owur*/ int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx,
                                   const EVP_CIPHER *cipher, ENGINE *impl,
                                   const unsigned char *key,
                                   const unsigned char *iv, int enc);
  __owur int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out,
                              int *outl, const unsigned char *in, int inl);
  __owur int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *outm,
                             int *outl);
  __owur int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *outm,
                                int *outl);
  
  __owur int EVP_SignFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *s,
                           EVP_PKEY *pkey);
  
  __owur int EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sigret,
                            size_t *siglen, const unsigned char *tbs,
                            size_t tbslen);
  
  __owur int EVP_VerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sigbuf,
                             unsigned int siglen, EVP_PKEY *pkey);
  
  __owur int EVP_DigestVerify(EVP_MD_CTX *ctx, const unsigned char *sigret,
                              size_t siglen, const unsigned char *tbs,
                              size_t tbslen);
  
  /*__owur*/ int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
                                    const EVP_MD *type, ENGINE *e,
                                    EVP_PKEY *pkey);
  __owur int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
                                 size_t *siglen);
  
  __owur int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
                                  const EVP_MD *type, ENGINE *e,
                                  EVP_PKEY *pkey);
  __owur int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig,
                                   size_t siglen);
  
  # ifndef OPENSSL_NO_RSA
  __owur int EVP_OpenInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type,
                          const unsigned char *ek, int ekl,
                          const unsigned char *iv, EVP_PKEY *priv);
  __owur int EVP_OpenFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl);
  
  __owur int EVP_SealInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type,
                          unsigned char **ek, int *ekl, unsigned char *iv,
                          EVP_PKEY **pubk, int npubk);
  __owur int EVP_SealFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl);
  # endif
  
  EVP_ENCODE_CTX *EVP_ENCODE_CTX_new(void);
  void EVP_ENCODE_CTX_free(EVP_ENCODE_CTX *ctx);
  int EVP_ENCODE_CTX_copy(EVP_ENCODE_CTX *dctx, EVP_ENCODE_CTX *sctx);
  int EVP_ENCODE_CTX_num(EVP_ENCODE_CTX *ctx);
  void EVP_EncodeInit(EVP_ENCODE_CTX *ctx);
  int EVP_EncodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl,
                       const unsigned char *in, int inl);
  void EVP_EncodeFinal(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl);
  int EVP_EncodeBlock(unsigned char *t, const unsigned char *f, int n);
  
  void EVP_DecodeInit(EVP_ENCODE_CTX *ctx);
  int EVP_DecodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl,
                       const unsigned char *in, int inl);
  int EVP_DecodeFinal(EVP_ENCODE_CTX *ctx, unsigned
                      char *out, int *outl);
  int EVP_DecodeBlock(unsigned char *t, const unsigned char *f, int n);
  
  # if OPENSSL_API_COMPAT < 0x10100000L
  #  define EVP_CIPHER_CTX_init(c)      EVP_CIPHER_CTX_reset(c)
  #  define EVP_CIPHER_CTX_cleanup(c)   EVP_CIPHER_CTX_reset(c)
  # endif
  EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void);
  int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *c);
  void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *c);
  int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *x, int keylen);
  int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *c, int pad);
  int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr);
  int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key);
  
  const BIO_METHOD *BIO_f_md(void);
  const BIO_METHOD *BIO_f_base64(void);
  const BIO_METHOD *BIO_f_cipher(void);
  const BIO_METHOD *BIO_f_reliable(void);
  __owur int BIO_set_cipher(BIO *b, const EVP_CIPHER *c, const unsigned char *k,
                            const unsigned char *i, int enc);
  
  const EVP_MD *EVP_md_null(void);
  # ifndef OPENSSL_NO_MD2
  const EVP_MD *EVP_md2(void);
  # endif
  # ifndef OPENSSL_NO_MD4
  const EVP_MD *EVP_md4(void);
  # endif
  # ifndef OPENSSL_NO_MD5
  const EVP_MD *EVP_md5(void);
  const EVP_MD *EVP_md5_sha1(void);
  # endif
  # ifndef OPENSSL_NO_BLAKE2
  const EVP_MD *EVP_blake2b512(void);
  const EVP_MD *EVP_blake2s256(void);
  # endif
  const EVP_MD *EVP_sha1(void);
  const EVP_MD *EVP_sha224(void);
  const EVP_MD *EVP_sha256(void);
  const EVP_MD *EVP_sha384(void);
  const EVP_MD *EVP_sha512(void);
  const EVP_MD *EVP_sha512_224(void);
  const EVP_MD *EVP_sha512_256(void);
  const EVP_MD *EVP_sha3_224(void);
  const EVP_MD *EVP_sha3_256(void);
  const EVP_MD *EVP_sha3_384(void);
  const EVP_MD *EVP_sha3_512(void);
  const EVP_MD *EVP_shake128(void);
  const EVP_MD *EVP_shake256(void);
  # ifndef OPENSSL_NO_MDC2
  const EVP_MD *EVP_mdc2(void);
  # endif
  # ifndef OPENSSL_NO_RMD160
  const EVP_MD *EVP_ripemd160(void);
  # endif
  # ifndef OPENSSL_NO_WHIRLPOOL
  const EVP_MD *EVP_whirlpool(void);
  # endif
  # ifndef OPENSSL_NO_SM3
  const EVP_MD *EVP_sm3(void);
  # endif
  const EVP_CIPHER *EVP_enc_null(void); /* does nothing :-) */
  # ifndef OPENSSL_NO_DES
  const EVP_CIPHER *EVP_des_ecb(void);
  const EVP_CIPHER *EVP_des_ede(void);
  const EVP_CIPHER *EVP_des_ede3(void);
  const EVP_CIPHER *EVP_des_ede_ecb(void);
  const EVP_CIPHER *EVP_des_ede3_ecb(void);
  const EVP_CIPHER *EVP_des_cfb64(void);
  #  define EVP_des_cfb EVP_des_cfb64
  const EVP_CIPHER *EVP_des_cfb1(void);
  const EVP_CIPHER *EVP_des_cfb8(void);
  const EVP_CIPHER *EVP_des_ede_cfb64(void);
  #  define EVP_des_ede_cfb EVP_des_ede_cfb64
  const EVP_CIPHER *EVP_des_ede3_cfb64(void);
  #  define EVP_des_ede3_cfb EVP_des_ede3_cfb64
  const EVP_CIPHER *EVP_des_ede3_cfb1(void);
  const EVP_CIPHER *EVP_des_ede3_cfb8(void);
  const EVP_CIPHER *EVP_des_ofb(void);
  const EVP_CIPHER *EVP_des_ede_ofb(void);
  const EVP_CIPHER *EVP_des_ede3_ofb(void);
  const EVP_CIPHER *EVP_des_cbc(void);
  const EVP_CIPHER *EVP_des_ede_cbc(void);
  const EVP_CIPHER *EVP_des_ede3_cbc(void);
  const EVP_CIPHER *EVP_desx_cbc(void);
  const EVP_CIPHER *EVP_des_ede3_wrap(void);
  /*
   * This should now be supported through the dev_crypto ENGINE. But also, why
   * are rc4 and md5 declarations made here inside a "NO_DES" precompiler
   * branch?
   */
  # endif
  # ifndef OPENSSL_NO_RC4
  const EVP_CIPHER *EVP_rc4(void);
  const EVP_CIPHER *EVP_rc4_40(void);
  #  ifndef OPENSSL_NO_MD5
  const EVP_CIPHER *EVP_rc4_hmac_md5(void);
  #  endif
  # endif
  # ifndef OPENSSL_NO_IDEA
  const EVP_CIPHER *EVP_idea_ecb(void);
  const EVP_CIPHER *EVP_idea_cfb64(void);
  #  define EVP_idea_cfb EVP_idea_cfb64
  const EVP_CIPHER *EVP_idea_ofb(void);
  const EVP_CIPHER *EVP_idea_cbc(void);
  # endif
  # ifndef OPENSSL_NO_RC2
  const EVP_CIPHER *EVP_rc2_ecb(void);
  const EVP_CIPHER *EVP_rc2_cbc(void);
  const EVP_CIPHER *EVP_rc2_40_cbc(void);
  const EVP_CIPHER *EVP_rc2_64_cbc(void);
  const EVP_CIPHER *EVP_rc2_cfb64(void);
  #  define EVP_rc2_cfb EVP_rc2_cfb64
  const EVP_CIPHER *EVP_rc2_ofb(void);
  # endif
  # ifndef OPENSSL_NO_BF
  const EVP_CIPHER *EVP_bf_ecb(void);
  const EVP_CIPHER *EVP_bf_cbc(void);
  const EVP_CIPHER *EVP_bf_cfb64(void);
  #  define EVP_bf_cfb EVP_bf_cfb64
  const EVP_CIPHER *EVP_bf_ofb(void);
  # endif
  # ifndef OPENSSL_NO_CAST
  const EVP_CIPHER *EVP_cast5_ecb(void);
  const EVP_CIPHER *EVP_cast5_cbc(void);
  const EVP_CIPHER *EVP_cast5_cfb64(void);
  #  define EVP_cast5_cfb EVP_cast5_cfb64
  const EVP_CIPHER *EVP_cast5_ofb(void);
  # endif
  # ifndef OPENSSL_NO_RC5
  const EVP_CIPHER *EVP_rc5_32_12_16_cbc(void);
  const EVP_CIPHER *EVP_rc5_32_12_16_ecb(void);
  const EVP_CIPHER *EVP_rc5_32_12_16_cfb64(void);
  #  define EVP_rc5_32_12_16_cfb EVP_rc5_32_12_16_cfb64
  const EVP_CIPHER *EVP_rc5_32_12_16_ofb(void);
  # endif
  const EVP_CIPHER *EVP_aes_128_ecb(void);
  const EVP_CIPHER *EVP_aes_128_cbc(void);
  const EVP_CIPHER *EVP_aes_128_cfb1(void);
  const EVP_CIPHER *EVP_aes_128_cfb8(void);
  const EVP_CIPHER *EVP_aes_128_cfb128(void);
  # define EVP_aes_128_cfb EVP_aes_128_cfb128
  const EVP_CIPHER *EVP_aes_128_ofb(void);
  const EVP_CIPHER *EVP_aes_128_ctr(void);
  const EVP_CIPHER *EVP_aes_128_ccm(void);
  const EVP_CIPHER *EVP_aes_128_gcm(void);
  const EVP_CIPHER *EVP_aes_128_xts(void);
  const EVP_CIPHER *EVP_aes_128_wrap(void);
  const EVP_CIPHER *EVP_aes_128_wrap_pad(void);
  # ifndef OPENSSL_NO_OCB
  const EVP_CIPHER *EVP_aes_128_ocb(void);
  # endif
  const EVP_CIPHER *EVP_aes_192_ecb(void);
  const EVP_CIPHER *EVP_aes_192_cbc(void);
  const EVP_CIPHER *EVP_aes_192_cfb1(void);
  const EVP_CIPHER *EVP_aes_192_cfb8(void);
  const EVP_CIPHER *EVP_aes_192_cfb128(void);
  # define EVP_aes_192_cfb EVP_aes_192_cfb128
  const EVP_CIPHER *EVP_aes_192_ofb(void);
  const EVP_CIPHER *EVP_aes_192_ctr(void);
  const EVP_CIPHER *EVP_aes_192_ccm(void);
  const EVP_CIPHER *EVP_aes_192_gcm(void);
  const EVP_CIPHER *EVP_aes_192_wrap(void);
  const EVP_CIPHER *EVP_aes_192_wrap_pad(void);
  # ifndef OPENSSL_NO_OCB
  const EVP_CIPHER *EVP_aes_192_ocb(void);
  # endif
  const EVP_CIPHER *EVP_aes_256_ecb(void);
  const EVP_CIPHER *EVP_aes_256_cbc(void);
  const EVP_CIPHER *EVP_aes_256_cfb1(void);
  const EVP_CIPHER *EVP_aes_256_cfb8(void);
  const EVP_CIPHER *EVP_aes_256_cfb128(void);
  # define EVP_aes_256_cfb EVP_aes_256_cfb128
  const EVP_CIPHER *EVP_aes_256_ofb(void);
  const EVP_CIPHER *EVP_aes_256_ctr(void);
  const EVP_CIPHER *EVP_aes_256_ccm(void);
  const EVP_CIPHER *EVP_aes_256_gcm(void);
  const EVP_CIPHER *EVP_aes_256_xts(void);
  const EVP_CIPHER *EVP_aes_256_wrap(void);
  const EVP_CIPHER *EVP_aes_256_wrap_pad(void);
  # ifndef OPENSSL_NO_OCB
  const EVP_CIPHER *EVP_aes_256_ocb(void);
  # endif
  const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void);
  const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void);
  const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha256(void);
  const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha256(void);
  # ifndef OPENSSL_NO_ARIA
  const EVP_CIPHER *EVP_aria_128_ecb(void);
  const EVP_CIPHER *EVP_aria_128_cbc(void);
  const EVP_CIPHER *EVP_aria_128_cfb1(void);
  const EVP_CIPHER *EVP_aria_128_cfb8(void);
  const EVP_CIPHER *EVP_aria_128_cfb128(void);
  #  define EVP_aria_128_cfb EVP_aria_128_cfb128
  const EVP_CIPHER *EVP_aria_128_ctr(void);
  const EVP_CIPHER *EVP_aria_128_ofb(void);
  const EVP_CIPHER *EVP_aria_128_gcm(void);
  const EVP_CIPHER *EVP_aria_128_ccm(void);
  const EVP_CIPHER *EVP_aria_192_ecb(void);
  const EVP_CIPHER *EVP_aria_192_cbc(void);
  const EVP_CIPHER *EVP_aria_192_cfb1(void);
  const EVP_CIPHER *EVP_aria_192_cfb8(void);
  const EVP_CIPHER *EVP_aria_192_cfb128(void);
  #  define EVP_aria_192_cfb EVP_aria_192_cfb128
  const EVP_CIPHER *EVP_aria_192_ctr(void);
  const EVP_CIPHER *EVP_aria_192_ofb(void);
  const EVP_CIPHER *EVP_aria_192_gcm(void);
  const EVP_CIPHER *EVP_aria_192_ccm(void);
  const EVP_CIPHER *EVP_aria_256_ecb(void);
  const EVP_CIPHER *EVP_aria_256_cbc(void);
  const EVP_CIPHER *EVP_aria_256_cfb1(void);
  const EVP_CIPHER *EVP_aria_256_cfb8(void);
  const EVP_CIPHER *EVP_aria_256_cfb128(void);
  #  define EVP_aria_256_cfb EVP_aria_256_cfb128
  const EVP_CIPHER *EVP_aria_256_ctr(void);
  const EVP_CIPHER *EVP_aria_256_ofb(void);
  const EVP_CIPHER *EVP_aria_256_gcm(void);
  const EVP_CIPHER *EVP_aria_256_ccm(void);
  # endif
  # ifndef OPENSSL_NO_CAMELLIA
  const EVP_CIPHER *EVP_camellia_128_ecb(void);
  const EVP_CIPHER *EVP_camellia_128_cbc(void);
  const EVP_CIPHER *EVP_camellia_128_cfb1(void);
  const EVP_CIPHER *EVP_camellia_128_cfb8(void);
  const EVP_CIPHER *EVP_camellia_128_cfb128(void);
  #  define EVP_camellia_128_cfb EVP_camellia_128_cfb128
  const EVP_CIPHER *EVP_camellia_128_ofb(void);
  const EVP_CIPHER *EVP_camellia_128_ctr(void);
  const EVP_CIPHER *EVP_camellia_192_ecb(void);
  const EVP_CIPHER *EVP_camellia_192_cbc(void);
  const EVP_CIPHER *EVP_camellia_192_cfb1(void);
  const EVP_CIPHER *EVP_camellia_192_cfb8(void);
  const EVP_CIPHER *EVP_camellia_192_cfb128(void);
  #  define EVP_camellia_192_cfb EVP_camellia_192_cfb128
  const EVP_CIPHER *EVP_camellia_192_ofb(void);
  const EVP_CIPHER *EVP_camellia_192_ctr(void);
  const EVP_CIPHER *EVP_camellia_256_ecb(void);
  const EVP_CIPHER *EVP_camellia_256_cbc(void);
  const EVP_CIPHER *EVP_camellia_256_cfb1(void);
  const EVP_CIPHER *EVP_camellia_256_cfb8(void);
  const EVP_CIPHER *EVP_camellia_256_cfb128(void);
  #  define EVP_camellia_256_cfb EVP_camellia_256_cfb128
  const EVP_CIPHER *EVP_camellia_256_ofb(void);
  const EVP_CIPHER *EVP_camellia_256_ctr(void);
  # endif
  # ifndef OPENSSL_NO_CHACHA
  const EVP_CIPHER *EVP_chacha20(void);
  #  ifndef OPENSSL_NO_POLY1305
  const EVP_CIPHER *EVP_chacha20_poly1305(void);
  #  endif
  # endif
  
  # ifndef OPENSSL_NO_SEED
  const EVP_CIPHER *EVP_seed_ecb(void);
  const EVP_CIPHER *EVP_seed_cbc(void);
  const EVP_CIPHER *EVP_seed_cfb128(void);
  #  define EVP_seed_cfb EVP_seed_cfb128
  const EVP_CIPHER *EVP_seed_ofb(void);
  # endif
  
  # ifndef OPENSSL_NO_SM4
  const EVP_CIPHER *EVP_sm4_ecb(void);
  const EVP_CIPHER *EVP_sm4_cbc(void);
  const EVP_CIPHER *EVP_sm4_cfb128(void);
  #  define EVP_sm4_cfb EVP_sm4_cfb128
  const EVP_CIPHER *EVP_sm4_ofb(void);
  const EVP_CIPHER *EVP_sm4_ctr(void);
  # endif
  
  # if OPENSSL_API_COMPAT < 0x10100000L
  #  define OPENSSL_add_all_algorithms_conf() \
      OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS \
                          | OPENSSL_INIT_ADD_ALL_DIGESTS \
                          | OPENSSL_INIT_LOAD_CONFIG, NULL)
  #  define OPENSSL_add_all_algorithms_noconf() \
      OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS \
                          | OPENSSL_INIT_ADD_ALL_DIGESTS, NULL)
  
  #  ifdef OPENSSL_LOAD_CONF
  #   define OpenSSL_add_all_algorithms() OPENSSL_add_all_algorithms_conf()
  #  else
  #   define OpenSSL_add_all_algorithms() OPENSSL_add_all_algorithms_noconf()
  #  endif
  
  #  define OpenSSL_add_all_ciphers() \
      OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS, NULL)
  #  define OpenSSL_add_all_digests() \
      OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_DIGESTS, NULL)
  
  #  define EVP_cleanup() while(0) continue
  # endif
  
  int EVP_add_cipher(const EVP_CIPHER *cipher);
  int EVP_add_digest(const EVP_MD *digest);
  
  const EVP_CIPHER *EVP_get_cipherbyname(const char *name);
  const EVP_MD *EVP_get_digestbyname(const char *name);
  
  void EVP_CIPHER_do_all(void (*fn) (const EVP_CIPHER *ciph,
                                     const char *from, const char *to, void *x),
                         void *arg);
  void EVP_CIPHER_do_all_sorted(void (*fn)
                                 (const EVP_CIPHER *ciph, const char *from,
                                  const char *to, void *x), void *arg);
  
  void EVP_MD_do_all(void (*fn) (const EVP_MD *ciph,
                                 const char *from, const char *to, void *x),
                     void *arg);
  void EVP_MD_do_all_sorted(void (*fn)
                             (const EVP_MD *ciph, const char *from,
                              const char *to, void *x), void *arg);
  
  int EVP_PKEY_decrypt_old(unsigned char *dec_key,
                           const unsigned char *enc_key, int enc_key_len,
                           EVP_PKEY *private_key);
  int EVP_PKEY_encrypt_old(unsigned char *enc_key,
                           const unsigned char *key, int key_len,
                           EVP_PKEY *pub_key);
  int EVP_PKEY_type(int type);
  int EVP_PKEY_id(const EVP_PKEY *pkey);
  int EVP_PKEY_base_id(const EVP_PKEY *pkey);
  int EVP_PKEY_bits(const EVP_PKEY *pkey);
  int EVP_PKEY_security_bits(const EVP_PKEY *pkey);
  int EVP_PKEY_size(const EVP_PKEY *pkey);
  int EVP_PKEY_set_type(EVP_PKEY *pkey, int type);
  int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len);
  int EVP_PKEY_set_alias_type(EVP_PKEY *pkey, int type);
  # ifndef OPENSSL_NO_ENGINE
  int EVP_PKEY_set1_engine(EVP_PKEY *pkey, ENGINE *e);
  ENGINE *EVP_PKEY_get0_engine(const EVP_PKEY *pkey);
  # endif
  int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key);
  void *EVP_PKEY_get0(const EVP_PKEY *pkey);
  const unsigned char *EVP_PKEY_get0_hmac(const EVP_PKEY *pkey, size_t *len);
  # ifndef OPENSSL_NO_POLY1305
  const unsigned char *EVP_PKEY_get0_poly1305(const EVP_PKEY *pkey, size_t *len);
  # endif
  # ifndef OPENSSL_NO_SIPHASH
  const unsigned char *EVP_PKEY_get0_siphash(const EVP_PKEY *pkey, size_t *len);
  # endif
  
  # ifndef OPENSSL_NO_RSA
  struct rsa_st;
  int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, struct rsa_st *key);
  struct rsa_st *EVP_PKEY_get0_RSA(EVP_PKEY *pkey);
  struct rsa_st *EVP_PKEY_get1_RSA(EVP_PKEY *pkey);
  # endif
  # ifndef OPENSSL_NO_DSA
  struct dsa_st;
  int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, struct dsa_st *key);
  struct dsa_st *EVP_PKEY_get0_DSA(EVP_PKEY *pkey);
  struct dsa_st *EVP_PKEY_get1_DSA(EVP_PKEY *pkey);
  # endif
  # ifndef OPENSSL_NO_DH
  struct dh_st;
  int EVP_PKEY_set1_DH(EVP_PKEY *pkey, struct dh_st *key);
  struct dh_st *EVP_PKEY_get0_DH(EVP_PKEY *pkey);
  struct dh_st *EVP_PKEY_get1_DH(EVP_PKEY *pkey);
  # endif
  # ifndef OPENSSL_NO_EC
  struct ec_key_st;
  int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, struct ec_key_st *key);
  struct ec_key_st *EVP_PKEY_get0_EC_KEY(EVP_PKEY *pkey);
  struct ec_key_st *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey);
  # endif
  
  EVP_PKEY *EVP_PKEY_new(void);
  int EVP_PKEY_up_ref(EVP_PKEY *pkey);
  void EVP_PKEY_free(EVP_PKEY *pkey);
  
  EVP_PKEY *d2i_PublicKey(int type, EVP_PKEY **a, const unsigned char **pp,
                          long length);
  int i2d_PublicKey(EVP_PKEY *a, unsigned char **pp);
  
  EVP_PKEY *d2i_PrivateKey(int type, EVP_PKEY **a, const unsigned char **pp,
                           long length);
  EVP_PKEY *d2i_AutoPrivateKey(EVP_PKEY **a, const unsigned char **pp,
                               long length);
  int i2d_PrivateKey(EVP_PKEY *a, unsigned char **pp);
  
  int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from);
  int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey);
  int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode);
  int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b);
  
  int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b);
  
  int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey,
                            int indent, ASN1_PCTX *pctx);
  int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey,
                             int indent, ASN1_PCTX *pctx);
  int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey,
                            int indent, ASN1_PCTX *pctx);
  
  int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid);
  
  int EVP_PKEY_set1_tls_encodedpoint(EVP_PKEY *pkey,
                                     const unsigned char *pt, size_t ptlen);
  size_t EVP_PKEY_get1_tls_encodedpoint(EVP_PKEY *pkey, unsigned char **ppt);
  
  int EVP_CIPHER_type(const EVP_CIPHER *ctx);
  
  /* calls methods */
  int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type);
  int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type);
  
  /* These are used by EVP_CIPHER methods */
  int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type);
  int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type);
  
  /* PKCS5 password based encryption */
  int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
                         ASN1_TYPE *param, const EVP_CIPHER *cipher,
                         const EVP_MD *md, int en_de);
  int PKCS5_PBKDF2_HMAC_SHA1(const char *pass, int passlen,
                             const unsigned char *salt, int saltlen, int iter,
                             int keylen, unsigned char *out);
  int PKCS5_PBKDF2_HMAC(const char *pass, int passlen,
                        const unsigned char *salt, int saltlen, int iter,
                        const EVP_MD *digest, int keylen, unsigned char *out);
  int PKCS5_v2_PBE_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
                            ASN1_TYPE *param, const EVP_CIPHER *cipher,
                            const EVP_MD *md, int en_de);
  
  #ifndef OPENSSL_NO_SCRYPT
  int EVP_PBE_scrypt(const char *pass, size_t passlen,
                     const unsigned char *salt, size_t saltlen,
                     uint64_t N, uint64_t r, uint64_t p, uint64_t maxmem,
                     unsigned char *key, size_t keylen);
  
  int PKCS5_v2_scrypt_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass,
                               int passlen, ASN1_TYPE *param,
                               const EVP_CIPHER *c, const EVP_MD *md, int en_de);
  #endif
  
  void PKCS5_PBE_add(void);
  
  int EVP_PBE_CipherInit(ASN1_OBJECT *pbe_obj, const char *pass, int passlen,
                         ASN1_TYPE *param, EVP_CIPHER_CTX *ctx, int en_de);
  
  /* PBE type */
  
  /* Can appear as the outermost AlgorithmIdentifier */
  # define EVP_PBE_TYPE_OUTER      0x0
  /* Is an PRF type OID */
  # define EVP_PBE_TYPE_PRF        0x1
  /* Is a PKCS#5 v2.0 KDF */
  # define EVP_PBE_TYPE_KDF        0x2
  
  int EVP_PBE_alg_add_type(int pbe_type, int pbe_nid, int cipher_nid,
                           int md_nid, EVP_PBE_KEYGEN *keygen);
  int EVP_PBE_alg_add(int nid, const EVP_CIPHER *cipher, const EVP_MD *md,
                      EVP_PBE_KEYGEN *keygen);
  int EVP_PBE_find(int type, int pbe_nid, int *pcnid, int *pmnid,
                   EVP_PBE_KEYGEN **pkeygen);
  void EVP_PBE_cleanup(void);
  int EVP_PBE_get(int *ptype, int *ppbe_nid, size_t num);
  
  # define ASN1_PKEY_ALIAS         0x1
  # define ASN1_PKEY_DYNAMIC       0x2
  # define ASN1_PKEY_SIGPARAM_NULL 0x4
  
  # define ASN1_PKEY_CTRL_PKCS7_SIGN       0x1
  # define ASN1_PKEY_CTRL_PKCS7_ENCRYPT    0x2
  # define ASN1_PKEY_CTRL_DEFAULT_MD_NID   0x3
  # define ASN1_PKEY_CTRL_CMS_SIGN         0x5
  # define ASN1_PKEY_CTRL_CMS_ENVELOPE     0x7
  # define ASN1_PKEY_CTRL_CMS_RI_TYPE      0x8
  
  # define ASN1_PKEY_CTRL_SET1_TLS_ENCPT   0x9
  # define ASN1_PKEY_CTRL_GET1_TLS_ENCPT   0xa
  
  int EVP_PKEY_asn1_get_count(void);
  const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_get0(int idx);
  const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find(ENGINE **pe, int type);
  const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find_str(ENGINE **pe,
                                                     const char *str, int len);
  int EVP_PKEY_asn1_add0(const EVP_PKEY_ASN1_METHOD *ameth);
  int EVP_PKEY_asn1_add_alias(int to, int from);
  int EVP_PKEY_asn1_get0_info(int *ppkey_id, int *pkey_base_id,
                              int *ppkey_flags, const char **pinfo,
                              const char **ppem_str,
                              const EVP_PKEY_ASN1_METHOD *ameth);
  
  const EVP_PKEY_ASN1_METHOD *EVP_PKEY_get0_asn1(const EVP_PKEY *pkey);
  EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_new(int id, int flags,
                                          const char *pem_str,
                                          const char *info);
  void EVP_PKEY_asn1_copy(EVP_PKEY_ASN1_METHOD *dst,
                          const EVP_PKEY_ASN1_METHOD *src);
  void EVP_PKEY_asn1_free(EVP_PKEY_ASN1_METHOD *ameth);
  void EVP_PKEY_asn1_set_public(EVP_PKEY_ASN1_METHOD *ameth,
                                int (*pub_decode) (EVP_PKEY *pk,
                                                   X509_PUBKEY *pub),
                                int (*pub_encode) (X509_PUBKEY *pub,
                                                   const EVP_PKEY *pk),
                                int (*pub_cmp) (const EVP_PKEY *a,
                                                const EVP_PKEY *b),
                                int (*pub_print) (BIO *out,
                                                  const EVP_PKEY *pkey,
                                                  int indent, ASN1_PCTX *pctx),
                                int (*pkey_size) (const EVP_PKEY *pk),
                                int (*pkey_bits) (const EVP_PKEY *pk));
  void EVP_PKEY_asn1_set_private(EVP_PKEY_ASN1_METHOD *ameth,
                                 int (*priv_decode) (EVP_PKEY *pk,
                                                     const PKCS8_PRIV_KEY_INFO
                                                     *p8inf),
                                 int (*priv_encode) (PKCS8_PRIV_KEY_INFO *p8,
                                                     const EVP_PKEY *pk),
                                 int (*priv_print) (BIO *out,
                                                    const EVP_PKEY *pkey,
                                                    int indent,
                                                    ASN1_PCTX *pctx));
  void EVP_PKEY_asn1_set_param(EVP_PKEY_ASN1_METHOD *ameth,
                               int (*param_decode) (EVP_PKEY *pkey,
                                                    const unsigned char **pder,
                                                    int derlen),
                               int (*param_encode) (const EVP_PKEY *pkey,
                                                    unsigned char **pder),
                               int (*param_missing) (const EVP_PKEY *pk),
                               int (*param_copy) (EVP_PKEY *to,
                                                  const EVP_PKEY *from),
                               int (*param_cmp) (const EVP_PKEY *a,
                                                 const EVP_PKEY *b),
                               int (*param_print) (BIO *out,
                                                   const EVP_PKEY *pkey,
                                                   int indent,
                                                   ASN1_PCTX *pctx));
  
  void EVP_PKEY_asn1_set_free(EVP_PKEY_ASN1_METHOD *ameth,
                              void (*pkey_free) (EVP_PKEY *pkey));
  void EVP_PKEY_asn1_set_ctrl(EVP_PKEY_ASN1_METHOD *ameth,
                              int (*pkey_ctrl) (EVP_PKEY *pkey, int op,
                                                long arg1, void *arg2));
  void EVP_PKEY_asn1_set_item(EVP_PKEY_ASN1_METHOD *ameth,
                              int (*item_verify) (EVP_MD_CTX *ctx,
                                                  const ASN1_ITEM *it,
                                                  void *asn,
                                                  X509_ALGOR *a,
                                                  ASN1_BIT_STRING *sig,
                                                  EVP_PKEY *pkey),
                              int (*item_sign) (EVP_MD_CTX *ctx,
                                                const ASN1_ITEM *it,
                                                void *asn,
                                                X509_ALGOR *alg1,
                                                X509_ALGOR *alg2,
                                                ASN1_BIT_STRING *sig));
  
  void EVP_PKEY_asn1_set_siginf(EVP_PKEY_ASN1_METHOD *ameth,
                                int (*siginf_set) (X509_SIG_INFO *siginf,
                                                   const X509_ALGOR *alg,
                                                   const ASN1_STRING *sig));
  
  void EVP_PKEY_asn1_set_check(EVP_PKEY_ASN1_METHOD *ameth,
                               int (*pkey_check) (const EVP_PKEY *pk));
  
  void EVP_PKEY_asn1_set_public_check(EVP_PKEY_ASN1_METHOD *ameth,
                                      int (*pkey_pub_check) (const EVP_PKEY *pk));
  
  void EVP_PKEY_asn1_set_param_check(EVP_PKEY_ASN1_METHOD *ameth,
                                     int (*pkey_param_check) (const EVP_PKEY *pk));
  
  void EVP_PKEY_asn1_set_set_priv_key(EVP_PKEY_ASN1_METHOD *ameth,
                                      int (*set_priv_key) (EVP_PKEY *pk,
                                                           const unsigned char
                                                              *priv,
                                                           size_t len));
  void EVP_PKEY_asn1_set_set_pub_key(EVP_PKEY_ASN1_METHOD *ameth,
                                     int (*set_pub_key) (EVP_PKEY *pk,
                                                         const unsigned char *pub,
                                                         size_t len));
  void EVP_PKEY_asn1_set_get_priv_key(EVP_PKEY_ASN1_METHOD *ameth,
                                      int (*get_priv_key) (const EVP_PKEY *pk,
                                                           unsigned char *priv,
                                                           size_t *len));
  void EVP_PKEY_asn1_set_get_pub_key(EVP_PKEY_ASN1_METHOD *ameth,
                                     int (*get_pub_key) (const EVP_PKEY *pk,
                                                         unsigned char *pub,
                                                         size_t *len));
  
  void EVP_PKEY_asn1_set_security_bits(EVP_PKEY_ASN1_METHOD *ameth,
                                       int (*pkey_security_bits) (const EVP_PKEY
                                                                  *pk));
  
  # define EVP_PKEY_OP_UNDEFINED           0
  # define EVP_PKEY_OP_PARAMGEN            (1<<1)
  # define EVP_PKEY_OP_KEYGEN              (1<<2)
  # define EVP_PKEY_OP_SIGN                (1<<3)
  # define EVP_PKEY_OP_VERIFY              (1<<4)
  # define EVP_PKEY_OP_VERIFYRECOVER       (1<<5)
  # define EVP_PKEY_OP_SIGNCTX             (1<<6)
  # define EVP_PKEY_OP_VERIFYCTX           (1<<7)
  # define EVP_PKEY_OP_ENCRYPT             (1<<8)
  # define EVP_PKEY_OP_DECRYPT             (1<<9)
  # define EVP_PKEY_OP_DERIVE              (1<<10)
  
  # define EVP_PKEY_OP_TYPE_SIG    \
          (EVP_PKEY_OP_SIGN | EVP_PKEY_OP_VERIFY | EVP_PKEY_OP_VERIFYRECOVER \
                  | EVP_PKEY_OP_SIGNCTX | EVP_PKEY_OP_VERIFYCTX)
  
  # define EVP_PKEY_OP_TYPE_CRYPT \
          (EVP_PKEY_OP_ENCRYPT | EVP_PKEY_OP_DECRYPT)
  
  # define EVP_PKEY_OP_TYPE_NOGEN \
          (EVP_PKEY_OP_TYPE_SIG | EVP_PKEY_OP_TYPE_CRYPT | EVP_PKEY_OP_DERIVE)
  
  # define EVP_PKEY_OP_TYPE_GEN \
                  (EVP_PKEY_OP_PARAMGEN | EVP_PKEY_OP_KEYGEN)
  
  # define  EVP_PKEY_CTX_set_signature_md(ctx, md) \
                  EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG,  \
                                          EVP_PKEY_CTRL_MD, 0, (void *)(md))
  
  # define  EVP_PKEY_CTX_get_signature_md(ctx, pmd)        \
                  EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG,  \
                                          EVP_PKEY_CTRL_GET_MD, 0, (void *)(pmd))
  
  # define  EVP_PKEY_CTX_set_mac_key(ctx, key, len)        \
                  EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_KEYGEN,  \
                                    EVP_PKEY_CTRL_SET_MAC_KEY, len, (void *)(key))
  
  # define EVP_PKEY_CTRL_MD                1
  # define EVP_PKEY_CTRL_PEER_KEY          2
  
  # define EVP_PKEY_CTRL_PKCS7_ENCRYPT     3
  # define EVP_PKEY_CTRL_PKCS7_DECRYPT     4
  
  # define EVP_PKEY_CTRL_PKCS7_SIGN        5
  
  # define EVP_PKEY_CTRL_SET_MAC_KEY       6
  
  # define EVP_PKEY_CTRL_DIGESTINIT        7
  
  /* Used by GOST key encryption in TLS */
  # define EVP_PKEY_CTRL_SET_IV            8
  
  # define EVP_PKEY_CTRL_CMS_ENCRYPT       9
  # define EVP_PKEY_CTRL_CMS_DECRYPT       10
  # define EVP_PKEY_CTRL_CMS_SIGN          11
  
  # define EVP_PKEY_CTRL_CIPHER            12
  
  # define EVP_PKEY_CTRL_GET_MD            13
  
  # define EVP_PKEY_CTRL_SET_DIGEST_SIZE   14
  
  # define EVP_PKEY_ALG_CTRL               0x1000
  
  # define EVP_PKEY_FLAG_AUTOARGLEN        2
  /*
   * Method handles all operations: don't assume any digest related defaults.
   */
  # define EVP_PKEY_FLAG_SIGCTX_CUSTOM     4
  
  /* Used by Chromium/QUIC */
  # define X25519_PRIVATE_KEY_LEN          32
  # define X25519_PUBLIC_VALUE_LEN         32
  
  const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type);
  EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags);
  void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
                               const EVP_PKEY_METHOD *meth);
  void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src);
  void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth);
  int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth);
  int EVP_PKEY_meth_remove(const EVP_PKEY_METHOD *pmeth);
  size_t EVP_PKEY_meth_get_count(void);
  const EVP_PKEY_METHOD *EVP_PKEY_meth_get0(size_t idx);
  
  EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e);
  EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e);
  EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *ctx);
  void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx);
  
  int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
                        int cmd, int p1, void *p2);
  int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx, const char *type,
                            const char *value);
  int EVP_PKEY_CTX_ctrl_uint64(EVP_PKEY_CTX *ctx, int keytype, int optype,
                               int cmd, uint64_t value);
  
  int EVP_PKEY_CTX_str2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *str);
  int EVP_PKEY_CTX_hex2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *hex);
  
  int EVP_PKEY_CTX_md(EVP_PKEY_CTX *ctx, int optype, int cmd, const char *md);
  
  int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx);
  void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen);
  
  EVP_PKEY *EVP_PKEY_new_mac_key(int type, ENGINE *e,
                                 const unsigned char *key, int keylen);
  EVP_PKEY *EVP_PKEY_new_raw_private_key(int type, ENGINE *e,
                                         const unsigned char *priv,
                                         size_t len);
  EVP_PKEY *EVP_PKEY_new_raw_public_key(int type, ENGINE *e,
                                        const unsigned char *pub,
                                        size_t len);
  int EVP_PKEY_get_raw_private_key(const EVP_PKEY *pkey, unsigned char *priv,
                                   size_t *len);
  int EVP_PKEY_get_raw_public_key(const EVP_PKEY *pkey, unsigned char *pub,
                                  size_t *len);
  
  EVP_PKEY *EVP_PKEY_new_CMAC_key(ENGINE *e, const unsigned char *priv,
                                  size_t len, const EVP_CIPHER *cipher);
  
  void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data);
  void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx);
  EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx);
  
  EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx);
  
  void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data);
  void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx);
  
  int EVP_PKEY_sign_init(EVP_PKEY_CTX *ctx);
  int EVP_PKEY_sign(EVP_PKEY_CTX *ctx,
                    unsigned char *sig, size_t *siglen,
                    const unsigned char *tbs, size_t tbslen);
  int EVP_PKEY_verify_init(EVP_PKEY_CTX *ctx);
  int EVP_PKEY_verify(EVP_PKEY_CTX *ctx,
                      const unsigned char *sig, size_t siglen,
                      const unsigned char *tbs, size_t tbslen);
  int EVP_PKEY_verify_recover_init(EVP_PKEY_CTX *ctx);
  int EVP_PKEY_verify_recover(EVP_PKEY_CTX *ctx,
                              unsigned char *rout, size_t *routlen,
                              const unsigned char *sig, size_t siglen);
  int EVP_PKEY_encrypt_init(EVP_PKEY_CTX *ctx);
  int EVP_PKEY_encrypt(EVP_PKEY_CTX *ctx,
                       unsigned char *out, size_t *outlen,
                       const unsigned char *in, size_t inlen);
  int EVP_PKEY_decrypt_init(EVP_PKEY_CTX *ctx);
  int EVP_PKEY_decrypt(EVP_PKEY_CTX *ctx,
                       unsigned char *out, size_t *outlen,
                       const unsigned char *in, size_t inlen);
  
  int EVP_PKEY_derive_init(EVP_PKEY_CTX *ctx);
  int EVP_PKEY_derive_set_peer(EVP_PKEY_CTX *ctx, EVP_PKEY *peer);
  int EVP_PKEY_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen);
  
  typedef int EVP_PKEY_gen_cb(EVP_PKEY_CTX *ctx);
  
  int EVP_PKEY_paramgen_init(EVP_PKEY_CTX *ctx);
  int EVP_PKEY_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey);
  int EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx);
  int EVP_PKEY_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey);
  int EVP_PKEY_check(EVP_PKEY_CTX *ctx);
  int EVP_PKEY_public_check(EVP_PKEY_CTX *ctx);
  int EVP_PKEY_param_check(EVP_PKEY_CTX *ctx);
  
  void EVP_PKEY_CTX_set_cb(EVP_PKEY_CTX *ctx, EVP_PKEY_gen_cb *cb);
  EVP_PKEY_gen_cb *EVP_PKEY_CTX_get_cb(EVP_PKEY_CTX *ctx);
  
  int EVP_PKEY_CTX_get_keygen_info(EVP_PKEY_CTX *ctx, int idx);
  
  void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
                              int (*init) (EVP_PKEY_CTX *ctx));
  
  void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
                              int (*copy) (EVP_PKEY_CTX *dst,
                                           EVP_PKEY_CTX *src));
  
  void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
                                 void (*cleanup) (EVP_PKEY_CTX *ctx));
  
  void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
                                  int (*paramgen_init) (EVP_PKEY_CTX *ctx),
                                  int (*paramgen) (EVP_PKEY_CTX *ctx,
                                                   EVP_PKEY *pkey));
  
  void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
                                int (*keygen_init) (EVP_PKEY_CTX *ctx),
                                int (*keygen) (EVP_PKEY_CTX *ctx,
                                               EVP_PKEY *pkey));
  
  void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
                              int (*sign_init) (EVP_PKEY_CTX *ctx),
                              int (*sign) (EVP_PKEY_CTX *ctx,
                                           unsigned char *sig, size_t *siglen,
                                           const unsigned char *tbs,
                                           size_t tbslen));
  
  void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
                                int (*verify_init) (EVP_PKEY_CTX *ctx),
                                int (*verify) (EVP_PKEY_CTX *ctx,
                                               const unsigned char *sig,
                                               size_t siglen,
                                               const unsigned char *tbs,
                                               size_t tbslen));
  
  void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
                                        int (*verify_recover_init) (EVP_PKEY_CTX
                                                                    *ctx),
                                        int (*verify_recover) (EVP_PKEY_CTX
                                                               *ctx,
                                                               unsigned char
                                                               *sig,
                                                               size_t *siglen,
                                                               const unsigned
                                                               char *tbs,
                                                               size_t tbslen));
  
  void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
                                 int (*signctx_init) (EVP_PKEY_CTX *ctx,
                                                      EVP_MD_CTX *mctx),
                                 int (*signctx) (EVP_PKEY_CTX *ctx,
                                                 unsigned char *sig,
                                                 size_t *siglen,
                                                 EVP_MD_CTX *mctx));
  
  void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
                                   int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
                                                          EVP_MD_CTX *mctx),
                                   int (*verifyctx) (EVP_PKEY_CTX *ctx,
                                                     const unsigned char *sig,
                                                     int siglen,
                                                     EVP_MD_CTX *mctx));
  
  void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
                                 int (*encrypt_init) (EVP_PKEY_CTX *ctx),
                                 int (*encryptfn) (EVP_PKEY_CTX *ctx,
                                                   unsigned char *out,
                                                   size_t *outlen,
                                                   const unsigned char *in,
                                                   size_t inlen));
  
  void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
                                 int (*decrypt_init) (EVP_PKEY_CTX *ctx),
                                 int (*decrypt) (EVP_PKEY_CTX *ctx,
                                                 unsigned char *out,
                                                 size_t *outlen,
                                                 const unsigned char *in,
                                                 size_t inlen));
  
  void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
                                int (*derive_init) (EVP_PKEY_CTX *ctx),
                                int (*derive) (EVP_PKEY_CTX *ctx,
                                               unsigned char *key,
                                               size_t *keylen));
  
  void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
                              int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
                                           void *p2),
                              int (*ctrl_str) (EVP_PKEY_CTX *ctx,
                                               const char *type,
                                               const char *value));
  
  void EVP_PKEY_meth_set_digestsign(EVP_PKEY_METHOD *pmeth,
                                    int (*digestsign) (EVP_MD_CTX *ctx,
                                                       unsigned char *sig,
                                                       size_t *siglen,
                                                       const unsigned char *tbs,
                                                       size_t tbslen));
  
  void EVP_PKEY_meth_set_digestverify(EVP_PKEY_METHOD *pmeth,
                                      int (*digestverify) (EVP_MD_CTX *ctx,
                                                           const unsigned char *sig,
                                                           size_t siglen,
                                                           const unsigned char *tbs,
                                                           size_t tbslen));
  
  void EVP_PKEY_meth_set_check(EVP_PKEY_METHOD *pmeth,
                               int (*check) (EVP_PKEY *pkey));
  
  void EVP_PKEY_meth_set_public_check(EVP_PKEY_METHOD *pmeth,
                                      int (*check) (EVP_PKEY *pkey));
  
  void EVP_PKEY_meth_set_param_check(EVP_PKEY_METHOD *pmeth,
                                     int (*check) (EVP_PKEY *pkey));
  
  void EVP_PKEY_meth_set_digest_custom(EVP_PKEY_METHOD *pmeth,
                                       int (*digest_custom) (EVP_PKEY_CTX *ctx,
                                                             EVP_MD_CTX *mctx));
  
  void EVP_PKEY_meth_get_init(const EVP_PKEY_METHOD *pmeth,
                              int (**pinit) (EVP_PKEY_CTX *ctx));
  
  void EVP_PKEY_meth_get_copy(const EVP_PKEY_METHOD *pmeth,
                              int (**pcopy) (EVP_PKEY_CTX *dst,
                                             EVP_PKEY_CTX *src));
  
  void EVP_PKEY_meth_get_cleanup(const EVP_PKEY_METHOD *pmeth,
                                 void (**pcleanup) (EVP_PKEY_CTX *ctx));
  
  void EVP_PKEY_meth_get_paramgen(const EVP_PKEY_METHOD *pmeth,
                                  int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
                                  int (**pparamgen) (EVP_PKEY_CTX *ctx,
                                                     EVP_PKEY *pkey));
  
  void EVP_PKEY_meth_get_keygen(const EVP_PKEY_METHOD *pmeth,
                                int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
                                int (**pkeygen) (EVP_PKEY_CTX *ctx,
                                                 EVP_PKEY *pkey));
  
  void EVP_PKEY_meth_get_sign(const EVP_PKEY_METHOD *pmeth,
                              int (**psign_init) (EVP_PKEY_CTX *ctx),
                              int (**psign) (EVP_PKEY_CTX *ctx,
                                             unsigned char *sig, size_t *siglen,
                                             const unsigned char *tbs,
                                             size_t tbslen));
  
  void EVP_PKEY_meth_get_verify(const EVP_PKEY_METHOD *pmeth,
                                int (**pverify_init) (EVP_PKEY_CTX *ctx),
                                int (**pverify) (EVP_PKEY_CTX *ctx,
                                                 const unsigned char *sig,
                                                 size_t siglen,
                                                 const unsigned char *tbs,
                                                 size_t tbslen));
  
  void EVP_PKEY_meth_get_verify_recover(const EVP_PKEY_METHOD *pmeth,
                                        int (**pverify_recover_init) (EVP_PKEY_CTX
                                                                      *ctx),
                                        int (**pverify_recover) (EVP_PKEY_CTX
                                                                 *ctx,
                                                                 unsigned char
                                                                 *sig,
                                                                 size_t *siglen,
                                                                 const unsigned
                                                                 char *tbs,
                                                                 size_t tbslen));
  
  void EVP_PKEY_meth_get_signctx(const EVP_PKEY_METHOD *pmeth,
                                 int (**psignctx_init) (EVP_PKEY_CTX *ctx,
                                                        EVP_MD_CTX *mctx),
                                 int (**psignctx) (EVP_PKEY_CTX *ctx,
                                                   unsigned char *sig,
                                                   size_t *siglen,
                                                   EVP_MD_CTX *mctx));
  
  void EVP_PKEY_meth_get_verifyctx(const EVP_PKEY_METHOD *pmeth,
                                   int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
                                                            EVP_MD_CTX *mctx),
                                   int (**pverifyctx) (EVP_PKEY_CTX *ctx,
                                                       const unsigned char *sig,
                                                       int siglen,
                                                       EVP_MD_CTX *mctx));
  
  void EVP_PKEY_meth_get_encrypt(const EVP_PKEY_METHOD *pmeth,
                                 int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
                                 int (**pencryptfn) (EVP_PKEY_CTX *ctx,
                                                     unsigned char *out,
                                                     size_t *outlen,
                                                     const unsigned char *in,
                                                     size_t inlen));
  
  void EVP_PKEY_meth_get_decrypt(const EVP_PKEY_METHOD *pmeth,
                                 int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
                                 int (**pdecrypt) (EVP_PKEY_CTX *ctx,
                                                   unsigned char *out,
                                                   size_t *outlen,
                                                   const unsigned char *in,
                                                   size_t inlen));
  
  void EVP_PKEY_meth_get_derive(const EVP_PKEY_METHOD *pmeth,
                                int (**pderive_init) (EVP_PKEY_CTX *ctx),
                                int (**pderive) (EVP_PKEY_CTX *ctx,
                                                 unsigned char *key,
                                                 size_t *keylen));
  
  void EVP_PKEY_meth_get_ctrl(const EVP_PKEY_METHOD *pmeth,
                              int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
                                             void *p2),
                              int (**pctrl_str) (EVP_PKEY_CTX *ctx,
                                                 const char *type,
                                                 const char *value));
  
  void EVP_PKEY_meth_get_digestsign(EVP_PKEY_METHOD *pmeth,
                                    int (**digestsign) (EVP_MD_CTX *ctx,
                                                        unsigned char *sig,
                                                        size_t *siglen,
                                                        const unsigned char *tbs,
                                                        size_t tbslen));
  
  void EVP_PKEY_meth_get_digestverify(EVP_PKEY_METHOD *pmeth,
                                      int (**digestverify) (EVP_MD_CTX *ctx,
                                                            const unsigned char *sig,
                                                            size_t siglen,
                                                            const unsigned char *tbs,
                                                            size_t tbslen));
  
  void EVP_PKEY_meth_get_check(const EVP_PKEY_METHOD *pmeth,
                               int (**pcheck) (EVP_PKEY *pkey));
  
  void EVP_PKEY_meth_get_public_check(const EVP_PKEY_METHOD *pmeth,
                                      int (**pcheck) (EVP_PKEY *pkey));
  
  void EVP_PKEY_meth_get_param_check(const EVP_PKEY_METHOD *pmeth,
                                     int (**pcheck) (EVP_PKEY *pkey));
  
  void EVP_PKEY_meth_get_digest_custom(EVP_PKEY_METHOD *pmeth,
                                       int (**pdigest_custom) (EVP_PKEY_CTX *ctx,
                                                               EVP_MD_CTX *mctx));
  void EVP_add_alg_module(void);
  
  
  # ifdef  __cplusplus
  }
  # endif
  #endif
  